AQA GCSE Physics · 8463
Specification 4.4.2.3 · Paper 1
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GCSE Physics · key term
The reduction in an emission compared with its initial value, often expressed as a fraction or ratio of the initial emission.
Used by AQA and OCR
Specification 4.4.2.3 · Paper 1
Specification P6.1k · Paper 2 (Foundation), Paper 4 (Higher)
The reduction from the original quantity; it equals the original quantity minus the quantity remaining.
Check whether a question asks for the amount remaining or the net decline. They are not the same.
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